Cool, this also works nicely. However, if I now hit "Ctrl+Space" within <custom:element <cursor>></custom:element> Oxygen offers *all* HTML attributes as well... can I somehow tweak Oxygen to only offer the attributes specified in my schema? And well, it sounded like you wanted me to tell the full s...

Thanks, very much, George, this works great and helps a lot! I'd have one last question to make the scenario really perfect: about Code Completion. Let's say I've the following HTML5 snippet with my custom namespaced elements: <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:custom="...

Thanks, folks - this works nicely! Anyway: I've two other validation issues, may be you can help out: * Oxygen claims that the tag "<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />" is not a valid header tag. Not sure, what the (X)HTML spec sais about this, but I think it is common p...

Thanks, very much for the prompt reply. In my opinion, this situation is really bad. Why so ever is the W3C releasing a recommendation this way? Why do they break validation support with any major schema language, force any tool vendor to change parsing algorithms... that's really disappointing. Btw...